Beverage container heating apparatuses and associated methods

A flexible sleeve configured to receive a beverage container, the flexible sleeve comprising:

• an inner layer configured to be positioned in contact with an exterior surface of the beverage container, wherein the inner layer comprises a reflective surface facing the beverage container and a heating element configured to provide heat to the exterior surface;
• a middle layer adjacent to and covering at least a portion of the inner layer, wherein the middle layer comprises an insulation assembly;
• and
• an outer layer adjacent to and covering at least a portion of the middle layer, wherein the outer layer comprises a battery and control circuitry electrically coupled to the heating element.

A flexible band configured to wrap around an exterior surface of a beverage container, the flexible band comprising:

• a reflective surface facing the beverage container;
• a heating element configured to provide heat to the exterior surface of the beverage container;
• a removable insulation assembly;
• a battery operably coupled to the heating element;
• control circuitry coupled to the heating element;
• and
• a temperature sensor coupled to the control circuitry and configured to measure a temperature of the exterior surface of the beverage container.